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Fly Parasite Release Instructions

Fly parasites (Muscidifurax zarapator, Spanglia spp.) are shipped still developing inside the host, packed in a paper bag, and mixed with wood shavings for protection. Depending on temperature conditions during shipment, parasites will start hatching 1-4 days after arrival. Warmer temperatures will make them hatch faster, while cooler temperatures will slow them down. Do not store at temperatures lower than 60 degrees F.

Start releases when some fly parasites have hatched in the bag. Keep the closed bag in a warm place (around 70 degrees F.) out of the sun until you notice some parasites walking around inside. Release fly parasites as close as possible to the breeding sites where fly larvae activity can be seen or is suspected. Do not release them all in one spot and try to cover the entire fly breeding area. Fly parasites will move around in a 100 yard radius in search of fly pupae and will even burrow into the breeding site. Simply sprinkle the parasites out of the bag onto the breeding site. If direct sun is a problem, covering the pupae with dirt or organic matter is advised.

Fly traps will help considerably in controlling migrating adult fly populations.




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Fly Parasites